<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-alert title="只允许为第三级分类设置相关参数！" type="warning" show-icon></el-alert>
            <el-row class=".cat_opt">
                <el-col>
                    <span>选择商品分类：</span>
                    <el-cascader v-model="selectedCateKeys" expand-trigger="hover" :options="cateList"
                        :props="cateProps" @change="handleChange">
                    </el-cascader>
                </el-col>
            </el-row>
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <el-tab-pane label="动态参数" name="many">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled"
                        @click="addDialogVisible = true">添加参数</el-button>
                    <el-table :data="manyTableData" border stripe>
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <el-tag v-for="(item ,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                                <el-input
                                    class="input-new-tag"
                                    v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue"
                                    ref="saveTagInput"
                                    size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)">
                                </el-input>
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button type="primary" icon="el-icon-edit" size="mini"
                                    @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                <el-button type="danger" icon="el-icon-delete" size="mini"
                                    @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
                <el-tab-pane label="静态属性" name="only">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled"
                        @click="addDialogVisible = true">添加属性</el-button>
                    <el-table :data="onlyTableData" border stripe>
                        <el-table-column type="expand" height="100px">
                            <template slot-scope="scope">
                                <el-tag v-for="(item ,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                                <el-input
                                    class="input-new-tag"
                                    v-if="scope.row.inputVisible"
                                    v-model="scope.row.inputValue"
                                    ref="saveTagInput"
                                    size="small"
                                    @keyup.enter.native="handleInputConfirm(scope.row)"
                                    @blur="handleInputConfirm(scope.row)">
                                </el-input>
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作"> 
                            <template slot-scope="scope">
                                <el-button type="primary" icon="el-icon-edit" size="mini"
                                    @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                <el-button type="danger" icon="el-icon-delete" size="mini"
                                    @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
            </el-tabs>

        </el-card>
        <el-dialog :title="'添加' + this.textTitle" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item :label="textTitle" prop="attr_name">
                    <el-input v-model="addForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
        </el-dialog>

        <el-dialog :title="'修改' + this.textTitle" :visible.sync="editDialogVisible" width="50%"
            @close="editDialogClosed">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item :label="textTitle" prop="attr_name">
                    <el-input v-model="editForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
 
<script>
export default {
    data() {
        return {
            cateList: [],
            selectedCateKeys: [],
            cateProps: {
                value: 'cat_id',
                label: 'cat_name',
                children: 'children'
            },
            activeName: 'many',
            manyTableData: [],
            onlyTableData: [],
            addDialogVisible: false,
            addForm: {
                attr_name: ''
            },
            addFormRules: {
                attr_name: [
                    { required: true, message: '请输入参数名称', trigger: 'blur' }
                ]

            },
            editDialogVisible: false,
            editForm: {

            },
            editFormRules: {
                attr_name: [
                    { required: true, message: '请输入参数名称', trigger: 'blur' }
                ]
            }
        }
    },
    created() {
        this.getCateList();
    },
    methods: {
        async getCateList() {
            const { data: res } = await this.$http.get('/api/private/v1/categories');
            if (res.meta.status !== 200) {
                this.$message.error('获取商品分类失败！');
            }
            // this.$message.success('获取商品分类成功');
            this.cateList = res.data;
        },
        handleChange() {
            this.getParamsData();
        },
        handleTabClick() {
            // console.log(this.activeName);
            this.getParamsData();
        },
        async getParamsData() {
            if (this.selectedCateKeys.length != 3) {
                this.selectedCateKeys = [];
                this.manyTableData = [];
                this.onlyTableData = [];
                return;
            }
            const { data: res } = await this.$http.get(`/api/private/v1/categories/${this.cateId}/attributes`,
             { params: { sel: this.activeName } });
            if (res.meta.status !== 200) {
                this.$message.error('获取参数列表失败! ');
            }
            res.data.forEach(item => {
                item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : [];
                item.inputVisible = false;
                item.inputValue = '';
            })
            // console.log(res.data);
            if (this.activeName === 'many') {
                this.manyTableData = res.data;
            } else {
                this.onlyTableData = res.data;
            }
        },
        addDialogClosed() {
            this.$refs.addFormRef.resetFields();
        },
        addParams() {
            this.$refs.addFormRef.validate(async valid => {

                if (!valid) return;
                const { data: res } = await this.$http.post(`/api/private/v1/categories/${this.cateId}/attributes`,
                    { attr_name: this.addForm.attr_name, attr_sel: this.activeName });
                if (res.meta.status !== 201) {
                    return this.$message.error('添加参数失败！');
                }
                this.$message.success('添加参数成功');
                this.addDialogVisible = false;
                this.getParamsData();
            })
        }, 
        editDialogClosed() {
            this.$refs.editFormRef.resetFields();
        },

        async showEditDialog(attr_id) {
            const { data: res } = await this.$http.get(`/api/private/v1/categories/${this.cateId}/attributes/${attr_id}`, {
                params: { attr_sel: this.activeName }
            });
            if (res.meta.status !== 200) {
                this.$message.error('获取参数信息失败!');
            }
            this.editForm = res.data;
            this.editDialogVisible = true;
        },
        editParams() {
            this.$refs.editFormRef.validate(async valid => {
                if (!valid) return;
                const { data: res } = await this.$http.put(`/api/private/v1/categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
                    { attr_name: this.editForm.attr_name, attr_sel: this.activeName });
                if (res.meta.status !== 200) {
                    return this.$message.error('获取参数失败！');

                }
                this.$message.success('获取参数成功');
                this.getParamsData();
                this.editDialogVisible = false;
            })
        },
        async removeParams(attr_id) {
            const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            } 
            ).catch(err => err);

            if(confirmResult !== 'confirm'){
                return this.$message.info('已取消删除');
            }
            const { data: res } = await this.$http.delete(`/api/private/v1/categories/${this.cateId}/attributes/${attr_id}`);
   
            if(res.meta.status !==200){
                return this.$message.error('删除参数失败！');
            }
            return this.$message.success('删除参数成功');
            this.getParamsData();
        },
        async handleInputConfirm(row) {
            if(row.inputValue.trim().length === 0) {
                row.inputValue = '';
                row.inputVisible = false;
                return;
            }
            row.attr_vals.push(row.inputValue.trim());
            row.inputValue = '';
            row.inputVisible = false;
            this.saveAttrVals(row);
        },
        showInput(row) {
            row.inputVisible = true;
            this.$nextTick(_ => {
                this.$refs.saveTagInput.$refs.input.focus();
            });
        },
        async saveAttrVals(row){
            const { data: res } = await this.$http.put(`/api/private/v1/categories/${this.cateId}/attributes/${row.attr_id}`,{
                attr_name: row.attr_name, attr_sel: row.attr_sel, attr_vals: row.attr_vals.join(' ')
            });
            if(res.meta.status !== 200 ){
                return this.$message.error('修改参数失败！');
            }
            return this.$message.success('修改参数成功');
        },
        handleClose(i,row){
            row.attr_vals.splice(i,1);
            this.saveAttrVals(row);
        } 
    },
    computed: {
        isBtnDisabled() {
            if (this.selectedCateKeys.length !== 3) {
                return true;
            }
            return false;
        },
        cateId() {
            if (this.selectedCateKeys.length == 3) {
                return this.selectedCateKeys[2];
            }
            return null;
        },
        textTitle() {
            if (this.activeName == 'many') {
                return '动态参数'
            } else {
                return '静态属性'
            }
        }
    }

}
</script>

<style lang = "less" scoped>
.cat_opt {
    margin: 20px, 0;
    margin-top: 30px;
}
.el-tag {
    margin: 10px;
}
.input-new-tag {
    width: 120px;
}
</style>